York YLAA0195HE, Manual, Page: 38 / 206

JOHNSON CONTROLS
38
FORM 150.72-NM3 (1020)
ISSUE DATE 10/05/2020
SECTION 4 – INSTALLATION
Foundation
The unit should be mounted on a flat and level
foundation, floor, or rooftop capable of supporting
the entire operating weight of the equipment.
See
PHYSICAL DATA for operating weights. If the unit is
elevated beyond the normal reach of service personnel,
a suitable catwalk must be capable of supporting service
personnel, their equipment, and the compressors.
Ground Level Locations
It is important that the units be installed on a substantial
base that will not settle. A one piece concrete slab
with footers extended below the frost line is highly
recommended. Additionally, the slab should not be
tied to the main building foundations as noise and
vibration may be transmitted. Mounting holes (5/8"
dia.) are provided in the steel channel for bolting the
unit to its foundation (see DIMENSIONS).
For ground level installations, precautions should be
taken to protect the unit from tampering by or injury to
unauthorized persons. Screws and/or latches on access
panels will prevent casual tampering. However, further
safety precautions such as a fenced-in enclosure or
locking devices on the panels may be advisable.
Rooftop Locations
Choose a spot with adequate structural strength to
safely support the entire weight of the unit and service
personnel. Care must be taken not to damage the roof.
Consult the building contractor or architect if the roof is
bonded. Roof installations should have wooden beams
(treated to reduce deterioration), cork, rubber, or spring
type vibration isolators under the base to minimize
vibration.
Noise Sensitive Locations
Efforts should be made to assure that the chiller is not
located next to occupied spaces or noise sensitive areas
where chiller noise level would be a problem. Chiller
noise is a result of compressor and fan operation.
SPRING ISOLATORS (OPTIONAL)
When ordered, four (4) isolators will be furnished.
Identify the isolator, locate at the proper mounting point,
and adjust per instructions.
COMPRESSOR MOUNTING
The compressors are mounted on four (4) rubber
isolators. The mounting bolts should not be loosened
or adjusted at installation of the chiller.
REMOTE COOLER OPTION
Not available at this time.
CHILLED LIQUID PIPING
General – When the unit(s) has been located in its
final position, the unit water piping may be connected.
Normal installation precautions should be observed in
order to receive maximum operating efficiencies. Piping
should be kept free of all foreign matter. All chilled water
evaporator piping must comply in all respects with local
plumbing codes and ordinances.
Since elbows, tees and valves decrease pump capacity,
all piping should be kept as straight and as simple as
possible. All piping must be supported independent
of the chiller.
Consideration should be given to com -
pressor access when laying out water
piping. Routing the water piping too
close to the unit could make compres -
sor servicing/replacement difficult.
Hand stop valves should be installed in all lines to
facilitate servicing.
Piping to the inlet and outlet connections of the chiller
should include high-pressure rubber hose or piping
loops to ensure against transmission of water pump
vibration. The necessary components must be obtained
in the field.
Drain connections should be provided at all low points
to permit complete drainage of the cooler and system
water piping.